Area: 16,490.0 sq. km. Population: 3,063.9 thousand habitants (2015). Capital: Vinh City. Administrative divisions: - Town: Cua Lo, Thai Hoa, Hoang Mai. - Districts: Dien Chau, Quynh Luu, Yen Thanh, Do Luong, Nghi Loc, Hung Nguyen, Nam Dan, Thanh Chuong, Tan Ky, Anh Son, Con Cuong, Nghia Dan, Quy Hop, Quy Chau, Que Phong, Tuong Duong, Ky Son. Ethnic groups: Viet (Kinh), Kho Mu, Tho, Thai, H'Mong...

Area: 1,377.6 sq. km. Population: 944.4 thousand habitants (2015). Capital: Ninh Binh City. Administrative divisions: - City: Tam Diep. - Districts: Nho Quan, Gia Vien, Hoa Lu, Yen Mo, Yen Khanh, Kim Son. Ethnic groups: Viet (Kinh), Muong, Thai, Tay.

Area: 3,358.3 sq. km. Population: 595.9 thousand habitants (2015). Capital: Phan Rang - Thap Cham City. Districts: Ninh Hai, Ninh Phuoc, Ninh Son, Bac Ai, Thuan Bac, Thuan Nam. Ethnic groups: Viet (Kinh), Cham, Ra Glai, Co Ho, Hoa.

Area: 3,533.3 sq. km. Population: 1,369.7 thousand habitants (2015). Capital: Viet Tri City. Administrative divisions: - Town: Phu Tho. - Districts: Ha Hoa, Thanh Ba, Doan Hung, Lam Thao, Thanh Son, Yen Lap, Tam Nong, Thanh Thuy, Phu Ninh, Cam Khe, Tan Son. Ethnic groups: Viet (Kinh), Muong, Dao, San Chay...

Area: 5,060.6 sq. km. Population: 893.4 thousand habitants (2015). Capital: Tuy Hoa City. Administrative divisions: - Town: Song Cau. - Districts: Dong Xuan, Tuy An, Son Hoa, Tay Hoa, Dong Hoa, Song Hinh, Phu Hoa. Ethnic groups: Viet (Kinh), Cham, Ba Na, E De.

Area: 8,065.3 sq. km. Population: 872.9 thousand habitants (2015). Capital: Dong Hoi City. Town: Ba Don. Districts: Tuyen Hoa, Minh Hoa, Quang Trach, Bo Trach, Quang Ninh, Le Thuy. Ethnic groups: Viet (Kinh), Bru - Van Kieu, Chut, Tay.

Area: 10,438.4 sq. km. Population: 1,480.3 thousand habitants (2015). Capital: Tam Ky City. Administrative divisions: - City: Hoi An. - Town: Dien Ban. - Districts: Dai Loc, Duy Xuyen, Nam Giang, Thang Binh, Que Son, Hiep Duc, Tien Phuoc, Phuoc Son, Nui Thanh, Bac Tra My, Nam Tra My, Tay Giang, Dong Giang, Phu Ninh, Nong Son. Ethnic groups: Viet (Kinh), Co Tu, Xo Dang, M'Nong, Co (Cor)...

Area: 5,152.7 sq. km. Population: 1,246.4 thousand habitants (2015). Capital: Quang Ngai City. Districts: Ly Son, Binh Son, Tra Bong, Son Tinh, Son Tay, Son Ha, Tu Nghia, Nghia Hanh, Minh Long, Mo Duc, Duc Pho, Ba To, Tay Tra. Ethnic groups: Viet (Kinh), Hre, Co, Xo Dang...

Area: 6,102.3 sq. km. Population: 1,211.3 thousand habitants (2015). Capital: Ha Long City. Administrative divisions: - City: Mong Cai, Uong Bi, Cam Pha. - Towns: Quang Yen, Dong Trieu. - Districts: Ba Che, Binh Lieu, Hai Ha, Dam Ha, Tien Yen, Van Don, Hoanh Bo, Co To. Ethnic groups: Viet (Kinh), Tay, Dao, San Chay, San Diu, Hoa...

Area: 4,739,8 sq. km. Population: 619.9 thousand habitants (2015). Capital: Dong Ha City. Administrative divisions: - Town: Quang Tri. - Districts: Vinh Linh, Gio Linh, Cam Lo, Trieu Phong, Hai Lang, Huong Hoa, Da Krong, Con Co. Ethnic groups: Viet (Kinh), Bru - Van Kieu, Ta Oi, Hoa.